Observation: Public
Observation Details
Name:
Zack WentzObservation Date:
February 21, 2021Submitted:
February 21, 2021Zone or Region:
West NorthActivity:
Skiing/SnowboardingLocation:
Swift Creek and Surrounding AreaSigns of Unstable Snow
Did you see shooting cracks?
Yes, WidespreadDid you experience collapsing or whumpfing?
NoObservations
Avalanche Obs: No new avalanches observed.
Snowpack Obs: 10-15cms of 4F- storm snow sits atop approx. 10cms of F hardness snow. Below the F hardness snow, there is a gradual increase in density until approx. 51cms where the Feb. 11th MF/cr interface is found. Numerous hand shears saw sudden planar results down approx. 21cms on storm interfaces and 10cms on storm interfaces, as well as down 51cms. Results from our snow profile immediately above Swift Creek on a NE aspect at treeline is as follows:
-CTE2SP down 15cms on storm interface
-CTM12RP down 20cms on storm interface
-CTH22SP down 51cms on Feb. 11th interface
-ECTN16 down 51cms on Feb. 11th interface
Weather Obs: Cloudy and stormy. Temps stayed cool, hovering around 30-32F all day at elevation of Grandma’s House. Precip: S1; winds: M from the SW
Advanced Observations
Observed Avalanche Problem #1:
Storm SlabComments:
Observed location: WidespreadPotential Size: Up to D2
Likelihood of triggering: Likely by a human
Layer depth: Storm interface down 20cms